Banking device fo r time-piege escapements



(N0 Model.)

L. ABBY.

BANKING DEVICE EOE TIME PIECE ESGAPBMENTS. No. 384,670. Patented June 19, 1888.

J "siren STATES PATENT OFFICEQ LEO AEBY, OF COLUMBUS, OHIO.

DEiiiCE FUR TIME-=PIECE ESCAPEMENTS,

SPECIFICATION forming part of Letters Patent No. 384,670, dated June 19, 1888.

Application tiled January l0, 188$.

To uZZ 207107. 2 27! may concern:

Be itknown that l, Lno Anny, a citizen of the United States, residing at Golumbus, in the county of ranklin and State of Ohio, have invented eeriai 11 new and useful Improvements in Banking Devices for \Vatches and other Time Keepers; and I do herebydeclare the following to be a full, clear, and exact description of the invention, such as will enable othersskilled in theart to which it appertains to make and use the same.

My invention relates to improved banking devices applicable to that description of watches or other timekeepers in which levercscapemcnts are employed. In this construction of watches or time-keepers it frequently happens that a greater impulse than usual is given to the balance by a sudden shake or other cause, whereby the ruby-pin, after the lever has made its movement, is carried so far around that it strikes forcibly against the outside of the lever-fork, and frequently is either damaged or the balance or staff pivot is broken or bent.

The object of my invention is to obviate these evils and to provide independently movable or adjustable banking devices, which can readily be applied to watches or other timekeepers now in use.

In carrying out my invention I employ a le ver-bridgc and lit in the wings thereof independentand adjustable banking-screws,which are arranged in the plane of action of the lever, with their in]icrendspointing toward the same, and at such distances therefrom as will insure its proper motion. These screws are set at a slight angle or inclination in the wings of the lever ln'idges, so that the lever will bank against their inner ends, which are flat and arranged parallel tothc sidesol' said lever, and

thus prevent anydiiference in the angle of its motion on account oi the necessary cnd-shake imparted In order t it my invention maybe fully understood, re rence is made to the accompanying drawings, wherein the same reference-let ters indicate the same parts, and in which----- Figure 1. re resents a plan view of so much of a watch with my improved banking de vices attached th rote as will enable those skilled. in the art it o readily understand my iu- Serial No. $360,343. (Yo model.)

vention, said figure showing a piece of a pil lar-plate, a forked lever attached thereto, and a winged lever-bridge provided with my inn proved banking devices; and Fig. 2 represents a side or edge view of the lever-bridge, showing the wing thereof as split in such manner as to hold the adjustable banking'screws with a clamping pressure.

A is a part of the pillar-plate of a watch.

B is the forked lever of a lever-escapcment mechanism.

0 is the levenbridge provided with the wings c 0, having the slits c c, and D D are the independently movable or adjustable bankingscrews arranged at a slight inclination for the purpose stated, and formed with holes and nicks d (1, for the use of a pin or screw-driver for regulating their distances from the lever and thus insuring the proper motion of the same.

The operation of my improved banking devices will be obvious to those skilled in the art. The independent banking screws, as

above stated, being arranged in the wings of the lever-bridge and in the plane of motion of the lever and at adjustable distances there from, will insure the proper action of said lever; also, as said screws are arranged at a slight angle or inclination, as stated, the lever will bank against their fiat contacting inner ends, which are parallel to the sides of said lever, and thus any difi'erence in the angle of motion of the lever because of the end-shake imparted thereto will be avoided.

It is obvious that minor changes in the construction and arrangement of the parts of my invention may be made without departing from the principle thereof-as, forinstance, the independent banking-screws are not necessarily placed in the wings of the lever-bridge, but may be passed through projections formed integrally with the pillar-plate,or through posts fitted in holes bored in said pillar-plate, or otherwise suitably arranged to take the place of the ordinary banking-pins and springs between which the levers act in the usual CO1]- structions of lever-escapement mechanisms.

Having thus fully described the construction, arrangement, and operation of the parts of my invention and the advantages thereof, what I claim as new is- 1. In a lever-escapement for watches, the combination of a pillar-plate and a lever with two independent adjustable banking devices arranged parallel to said pillar-plate and having their ends pointing toward said lever, substantially as described.

2. In a lever-escapement for watches, the combination of a pillar-plate and lever with two independent adjustable banking devices arranged parallel to said pillar-plate and at aslight angle or inclination to said lever, and having their inner ends pointing toward the same, substantially as and for the purpose described.

3. In a lever-escapernent for watches, the combination of a pillar-plate and a lever with two independent banking screws arranged parallel to said pillar-plate and ataslight angle or inclination to said lever, substantially as described. 1

4:. In a lever-escapement for watches, the combination vof a pillar-plate and a lever with two independent banking screws arranged parallel tosaid pillar-plate and at a slight angle or inclination to said lever and provided with holes for pins for moving them forward and backward, substantially as'described.

5. In a lever-escapement for watches, the combination of a pillar-plate, a lever, and a lever-bridge provided with wings, with two adjustable banking screws passing through said wings and arranged parallel to said pillarplate and at a slight angle or inclination to said lever, substantially as described.

6. In a lever-escapeinent for watches, the combination of a pillar-plate, a lever, and a le ver-bridge provided with split wings,with two adjustable banking -screws passing through said wings and arranged parallel to said pillarplate and at a slight angle or inclination to said lever, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

LEO AEBY.

Witnesses:

CHARLES WILLIS WARD, J. ALFRED AEBY. 

